diff options
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/kernel/vsyscall.c | 1 | ||||
| -rw-r--r-- | arch/x86_64/mm/init.c | 7 |
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/vsyscall.c b/arch/x86_64/kernel/vsyscall.c index 92546c1526f..c3de9a09cd9 100644 --- a/arch/x86_64/kernel/vsyscall.c +++ b/arch/x86_64/kernel/vsyscall.c @@ -290,6 +290,7 @@ static void __init map_vsyscall(void) extern char __vsyscall_0; unsigned long physaddr_page0 = __pa_symbol(&__vsyscall_0); + /* Note that VSYSCALL_MAPPED_PAGES must agree with the code below. */ __set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL); } diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index 4c0c00ef3ca..2968b90ef8a 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c @@ -730,14 +730,15 @@ static __init int x8664_sysctl_init(void) __initcall(x8664_sysctl_init); #endif -/* A pseudo VMAs to allow ptrace access for the vsyscall page. This only +/* A pseudo VMA to allow ptrace access for the vsyscall page. This only covers the 64bit vsyscall page now. 32bit has a real VMA now and does not need special handling anymore. */ static struct vm_area_struct gate_vma = { .vm_start = VSYSCALL_START, - .vm_end = VSYSCALL_END, - .vm_page_prot = PAGE_READONLY + .vm_end = VSYSCALL_START + (VSYSCALL_MAPPED_PAGES << PAGE_SHIFT), + .vm_page_prot = PAGE_READONLY_EXEC, + .vm_flags = VM_READ | VM_EXEC }; struct vm_area_struct *get_gate_vma(struct task_struct *tsk) |